#include <stdio.h>


void fun(int a,int b,long *c);
int main() {

    long c;
    fun(45,12,&c);

    printf("%ld",c);
    return 0;
}

void fun(int a,int b,long *c){
    int as = a / 10;
    int ag = a % 10;
    int bs = b / 10;
    int bg = b % 10;

    *c = as*1000 + ag*10 + bs*100 + bg;
}